Select Admin from the apps menu; this takes you to the Office 365 admin center

Expand the “Server Settings” menu

Select “Updates” located under the Server Settings menu.

Here we have several options to choose from.

Standard release: Get updates when Office 365 releases them broadly.

First release:Entire organization – Get updates early for your entire Office 365 organizationSelect people – Allows you to hand pick person in your organization to be on the cutting edge of the updates. This is a good idea if you need to have users such as support staff evaluate the new features pushed out from Office 365 as become available weeks ahead of others.